she comes to us as a mom. finish >> reporter: it's not unusual for first ladies to campaign for senators or representatives. for example, laura bush did it as well. jenna? jenna: well, molly, what do we expect exactly for the tone to be coming from the first lady? do we expect her to go on the attack against republicans. >> reporter: no. political analysts say that's traditionally not what first ladies do, nor is it what candidates want a first lady to do. sabato says, quote, the first lady doesn't do hard core partisan politics, she says nice things about the candidate she's with. it also gives gop candidates a chance to suggest their opponent isn't doing well enough on his or her own. in fact, a spokesperson for carly fiorina in california says, quote, national democrats are clearly so nervous about californians distaste for barbara boxer and her nearly three three-decade career of supporting job-killing policies that they're forced to send in reinforcements to try to salvage the only job boxer cares about;